Top critical review
Gambling without registration of a 2017 product - hope its not fake.
28 December 2018
Registration on website does not work, I did not get any email on successful registration, there's no login either. As others have pointed out it is an old 2017 product. Product itself seems well built, and simple. After a day of not running, it started at PPM 60-70 and in few hours came down to 20s, so it does seem to do something bu I cannot verify the accuracy.
If the registration and warranty had worked it would build confidence, without that it's a gamble. All said the product itself seems fine and easy to use. For now its a 3 star, hope it continues to work.